On Your Mark, Get Set, Self-Control, Go: A Differentiated View on the Cortical Hemodynamics of Self-Control during Sprint Start

Most sports are self-control demanding. For example, during a sprint start, athletes have to respond as fast as possible to the start signal (action initiation) while suppressing the urge to start too early (action inhibition). Here, we examined the cortical hemodynamic response to these demands by measuring activity in the two lateral prefrontal cortices (lPFC), a central area for self-control processes. We analyzed activity within subregions of the lPFC, while subjects performed a sprint start, and we assessed if activation varied as a function of hemisphere and gender. In a counterbalanced within-subject design, 39 participants (age: mean (M) = 22.44, standard deviation (SD) = 5.28, 22 women) completed four sprint start conditions (blocks). In each block, participants focused on inhibition (avoid false start), initiation (start fast), no start (do not start) and a combined condition (start fast; avoid false start). We show that oxyhemoglobin in the lPFC increased after the set signal and this increase did not differ between experimental conditions. Increased activation was primarily observed in ventral areas of the lPFC, but only in males, and this increase did not vary between hemispheres. This study provides further support for the involvement of the ventral lPFC during a sprint start, while highlighting gender differences in the processing of sprint start-induced self-control demands.

Comparative Perspectives on Communication in Human and Non-Human Primates

Comparative research on communication systems in human and non-human primates has struggled to find a common language for comparisons. Research has too often either embraced application of linguistic constructs to animal signals, or eschewed them altogether, with the result being either uncritical acceptance of continuity between human and animal communication, or wholesale dismissal of it. This chapter attempts to better align the discussion of communication in the two groups by highlighting the importance of low-level features of communication indisputably common to both. From this common starting point, the authors of this chapter invoke functional deployability as a critical pressure influencing signal structure and use, emphasizing conserved perceptuocognitive mechanisms as common targets of signal action. In recognizing these foundational building blocks, many productive avenues for future research open up. In particular, the authors suggest that perceptual and cognitive biases that promote certain types of signal-meaning mappings provide a natural, biosemantic substrate on which more robust communicative systems can be built.

SWINBURNE'S SEA-PROSE AND THE ANTI-NOVEL

Language can be made to revolt against its own instrumentality. That is the promise Algernon Charles Swinburne pursues in his unfinished novel Lesbia Brandon, composed in 1859–67 but not published until 1952. Early on in this work, we encounter a passage that perfectly showcases his peculiar and innovative prose style. It is a style that boldly invents its own mechanism of self-perpetuation, and, as it ramifies throughout the novel, turns the text into something other than a conventional narrative – a singular grammar of sensuous perception. The novel's young protagonist, Herbert Seyton, has rounded a corner of a coastal road and comes face to face with the sea. Lesbia Brandon is full of descriptions of the natural environment like this one. It is one of many moments in the novel in which characters encounter, experience, and merge with the seascape. These instances concatenate Swinburne's formal project throughout Lesbia Brandon, a project of translating forces that create patterns in the perceived world into models for prose. The resulting stylistic transformation extends not only to the figurative aspects of Swinburne's language but also to its grammatical and syntactic underpinnings, as peripheral, “accessory” elements become core shaping forces in the prose. This process is at work as Herbert rejoices in the sea-coast and all its enchantments: The long reefs that rang with returning waves and flashed with ebbing ripples; the smooth slopes of coloured rock full of small brilliant lakes that fed and saved from sunburning their anchored fleets of flowers, yellower lilies and redder roses of the sea; the sharp and fine sea-mosses, fruitful of grey blossom, fervent with blue and golden bloom, with soft spear-heads and blades brighter than fire; the lovely heavy motion of the stronger rock-rooted weeds, with all their weight afloat in languid water, splendid and supine; the broad bands of metallic light girdling the greyer flats and swaying levels of sea without a wave; all the enormous graces and immeasurable beauties that go with its sacred strength; the sharp delicate air about it, like breath from the nostrils and lips of its especial and gracious god; the hard sand inlaid with dry and luminous brine; the shuddering shades of sudden colour woven by the light with the water for some remote golden mile or two reaching from dusk to dusk under the sun; shot through with faint and fierce lustres that shiver and shift; and over all a fresher and sweeter heaven than is seen inland by any weather; drew his heart back day after day and satisfied it. (196-97; ch. 2) This description consists of just one sentence, containing 209 words and eleven semicolon-separated fragments. With its great length and accumulation of clauses alone, this passage announces that Swinburne's narrative practice will warp the dimensions of prose, stretching its habitual units, the sentence and the paragraph, beyond their usual span. This sentence is remarkable for its almost complete absence of verbs. Almost every one of its verbs (“rang,” “flashed,” “fed,” “saved,” “go,” “shiver,” “shift”) appears in a subordinate, defining clause that elaborates on the seascape's features. These verbs, for example, add specificity to the “long reefs” “that rang with returning waves and flashed with ebbing ripples,” point to the small lakes “that fed and saved from sunburning,” define the immeasurable beauties “that go with [the sea's] sacred strength,” and name the lusters “that shiver and shift.” At the sentence's conclusion, two predicates finally reveal its raison d’être in terms of plot: the wonders of the sea “drew his heart back day after day and satisfied it.” These are the events that motivate the description of the sea, but for most of the sentence's unfolding they are eclipsed, bowled over by the shimmering grammatical elaboration. Swinburne insistently adds adjectives to his nouns, singly and in multiples: “long reefs,” “returning waves,” “sharp slopes,” “small brilliant lakes,” “blue and golden bloom,” “sharp delicate air,” “dry and luminous brine,” “faint and fierce lustres.” Sometimes the adjectives are comparatives (“yellower lilies and redder roses”), and at others Swinburne piles adjectives all around a noun, surrounding it in a halo of modifiers, as in “the sharp and fine sea-mosses, fruitful,” “the hard sand inlaid,” and “sudden colour woven.” The adjectival imperative is so strong that it infiltrates and dilutes the verbs’ efficacy to signal action. In addition to the defining verbs (“that rang,” “that fed,” “that go,” “that shiver and shift”), two more verbs appear near the end of the passage in the form of the participles “girdling” and “reaching.” These do not name events but rather describe an enduring arrangement of “broad bands of metallic light” and a recurrent effect of water and light “reaching from dusk to dusk.” They, too, contribute to the adjectival mode that dominates this prose.

Improving signal passed at danger management in New Zealand rail operations: Combining stabilised approach procedures with risk-triggered commentary driving

The critical examination of driver cognition and information processing is vital to ensuring an effective signal passed at danger (SPAD) prevention strategy. Although this need was identified in KiwiRail’s organisational strategy to reduce signal passed at danger risk, the why and how factors were not clearly described and robustly linked to deliver the necessary effects. With risk-triggered commentary driving programmes gaining recognition as valuable components and activities within the driver competency model, an opportunity to couple risk-triggered commentary driving with stabilised approach methodologies and procedures, adopted from aviation and modified for use on New Zealand’s railway network was subsequently identified. A driver subject matter expert group was formed, a literature review completed, guidance developed and new procedures trialled. This activity provided new opportunities to introduce error-tolerant system design, increase accuracy of driver signal action response and reduce signal passed at danger risk on New Zealand’s National Rail System by adopting and designing bespoke methodologies that support enhanced driver cognition and safe system design.

Simulation and Research of New MW Wind Turbine Yaw Hydraulic System Based on AMEsim

This paper presents a new MW wind turbine yaw hydraulic system,and describes the working principle of the hydraulic system,derives kinetic equations of the electromagnetic proportional valve and the motor in the hydraulic circuit,uses AMEsim to establish a simulation model of the electromagnetic proportional valve control motor hydraulic system,sets parameters of main elements of the model,and simulates.given under the input current signal action,derives yaw motor shaft speed and time graphics,and analysis.

Singlet Oxygen Inhibits Agonist-Induced P-Selectin Expression and Formation of Platelet Aggregates

Major mediators of activated polymorphonuclear leukocytes (PMN) are the oxidants HOCl and chloramine, which are a source for the nonradical photon-emitting oxidant singlet oxygen (1O2). We were interested in a possible platelet-modulating activity of 1O2, As a stable 1O2 source we chose the mild oxidant chloramine T® (CT), which mimics the natural chloramine N-chloro-taurine. Freshly drawn native whole blood from donors (n = 5) was incubated at 0 to 3 mM CT for I minute at 37°C. Then saline, 10 μM adenosine diphosphate (ADP), 5 μg/mL collagen, or 6.25 μM thrombin receptor activator peptide (TRAP) were added and the mixtures were allowed to incubate for 3 minutes at 37°C. Aliquots of activated blood were fixed in 1% para-formaldehyde. After removal of the fixative, platelets were labeled with anti-CD61-FITC and anti-CD62P-PE antibodies and analyzed by flow cytometry. An oxidant concentration-dependent decrease in the expression of -selectin appeared (at 3 mM CT to 39, 23, and 20% of the 100% saline control level for ADP, collagen, and TRAP, respectively). There was also an oxidant concentration-dependent decrease in the formation of platelet aggregates (at 3 mM CT to 8, 12, and 13% of the 100% saline control level for ADP, collagen, and TRAP, respectively; the 50% effective dose was 1.0 to 1.5 mM chloramine). In ADP- and TRAP-stimulated platelets, an oxidant-mediated increase in platelet fragments appeared (at 3 mM CT: three- to fourfold of the initial value). The addition to the blood of 30 mM of the oxy-radical scavenger mannitol in contrast to excess methionine did not antagonize these oxidative modulations of platelet activation. The results were confirmed using equimolar concentrations of NaOCl and N-chloro-taurine. This study shows that 1O2 inhibits platelets, decreasing the expression of CD62P and the formation of platelet aggregates. Activated PMN might modulate hemostasis, shifting it into an antithrombotic state. The physiologic signal action and the direct anticoagulant action of 1O2 (released by chloramines such as vancomycin) might be a new principle for pharmacologic intervention in atherothrombosis.

A TEST FOR A BIOLOGICAL SIGNAL ENCODED BY NOISE

We consider here a simple example of stimulated sensory neurons operating under the influence of their own internal noise: the hair mechanoreceptor of the crayfish stimulated by a weak, periodic, hydrodynamic signal. Action potential spike trains from the sensory neuron are recorded and assembled into two objects for analysis: the interspike interval histogram (ISIH) and the cycle histogram of the spike density. A time transformation is carried out on the ISIH’s in order to test the hypothesis that the spike train is basically random and that the probability of coherent spike generation is related to the instantaneous stimulus amplitude. Moreover it is shown that the physiological spike train data can be qualitatively mimicked by an electronic Fitzhugh-Nagumo model, operated in the subcritical mode, driven by noise and a weak periodic signal. A discussion of how the Fitzhugh-Nagumo model is properly operated to mimic noisy data from sensory neurons is included.